How long it takes for a fetus to die after an induction injection is related to the size of the fetus and the week of gestation, with smaller fetuses and shorter weeks of gestation more likely to die. The main effect of the induction of labor is to induce stronger contractions to induce the expulsion of the fetus and placenta from the body, not to directly cause the death of the fetus. For smaller inductions, the fetus will die naturally during labor because it is not yet mature, and will usually be delivered 2-3 days after the induction of labor. In the case of induction of labor in larger months, the use of the induction injection alone will not cause the death of the fetus, which may be caused by the process of delivery. Also, the ultrasound should be reviewed after the induction of labor to observe if there is any residue, and if there is more residue in the uterine cavity it needs to be treated with a cervical evacuation. In addition, after induction of labor, you should actively adjust your lifestyle to promote recovery and keep your vulva clean to avoid intrauterine infection.